Ands e w



ftent met 'sind ffm.. f

,instruir Goo ovnis, or srnrneronr; Monteiro i I 'i Lettera .Patent No.` 66,146, dated 25,' 1867.

I IMPROVEMENT IN WOOD-TURNING LATHES.

ro ALL wenn rr MAY CON-onen;

i 33e it known that I, ANDREWGOODYEAR, of Springport, in the cou'ntyrot Jacksoman-il State of Michigan. have invented a new and useful Improvement in Wheel-Hub ATurning Lathes; and I do hereby declare that the following is al'full, clear, andvexact description of the oonstruction ,and operation 'of the same, reference boing had to the annexed drawings, making a. part ot' the speeilicaton, in whioh Figure lisa perspective view. i

Figure 2 is a cross-section of rou'gling cylinder, and partial side elevation of lat-he. y.

Similar letters Aof referenceindicatercorresponding. partsirbboth figures. p

My invention relates' to the use of a roughing'cylinder, furnished with moulding-shaped Aadjustable cutters, revolving in airame 'hinged to the ,lathe-bed, and employed in connection `with a slow geared' motion of the lathemandrel, the general construct-ion and operation of which I `will ,now proceed more fully to explain.

A represents the luedframe; B, the poppet-heads; E, theguide-kbed frame; and Il, sliding-cutteru'ests that operai-te by fixed cutters, shaped and set to a pattern, and fedup to gauige-stops against a revolving hub As 'tli'elinb-turninglathe exhibited in the drawing, and to which my improvement is applied, comprises mos1 ofthe prominentfeatures of the improved hub-lathe for ivhich a patent'(bearing date August 23, A. D. 1864, was awarded me, I dojnot deem it necessary to recapitulate the details thereof, but will confine Ymyself to suol modifications and additions as are proper to describe in'conneetion with the-.partsconstitutingsaid improve ment. ".lo the back side ofthe adjustableguidebed E, upon which the cutter-rests for finishing slide, I atta-eh bystrong hinge connections, a yoke-frarne, D, to which a cutting cylinder, 0,-is hung, in the bearings l. Thi cylinder I cause to revolve at a higlrspeed, by means of a belt, which passes over the small pulley P, and ove u. large one, P2, (see brok-en lines,) hung overhead in such position that the belt will tighten as the rouglxinl cylinder" C is drawn to its work. The body of the cylinder may be rectangular |crosssection, `and th' cutter-blades I-I secured by tap bolts, or made withllanged arms, as in fig.,2, and the cutters secured by nut on countersunk headed bolts, as usual'.- y As my object is to give a. rough approximate shape and size to the hub by means of thisv revolving outter cylinder, leaving just suieient-wood to enable the inishing cutters on th slider-este to cleanup to a perfect form and surface, and as the various classes of xvheel-lmbsV difer mterialll inieize and form, I so4 shape'the cutting edges of the sectional cnttes,\ (usually two central and` four end ones, that, by the aidof slotted bolt-holes, to allow Vthe cutters to be twisted around, and longitudin'al'slotsor range of bolt-holte, to permit an adjustment of the end cutters lengthwise, any desired approximation of rough for! and size may be given. Three bentlevers, L, jointed to a fulcrum-bar, F, have their `lower ends connected b.l

rods'(not seen) to the under sides of the sliding carriages G, and-their upper `ends are provided `with draw-rod: rl, furnished with handles within easyireacln in front of the operator. The swinging cylinder-frame, when no in use, is kept in contact withthe fulcrum-bur by one or more suitable 4springs, s, and is drawn to its Work hb the handle of Vthe drauv-rod r2, which maybeconvenicntly connected by an arm, a. The projecting ends of th drimv-rods` are upheld out of the way/,end guided in holes through the bent guide-yoke Y, the lower cnds'c which, as well as the bent ends of the fulcrixinbai', are all firmly secured to the side of the guide-bed the the cylindexframe is hingedv to A-bandnvheel, W, (driven usually from; belong) and furnished witlru lios:

pinion, p, revolves on a stud,.(not"s'cen,) which is secured to 'pivoted arm, -J, that rests'on spring-stops T, i

Buch manncflh'lt the PUOH le thrown in and out of gear with the spur-wheel S, which is keyed'to anovci hang of the lathe-Crn'u'ndrelRl.`

The'pinion beingio'ut of gea'rjaud the 'driving-belt on the loose pulley 0,' a cornered block, to be turned, i

driven on the turning-mandrel, which is centred in the lathe as usual, the adjustments of the various cuttei und stops having `been previously marde for the desired pattcrn. The operator, grasping the hondlo of the ro "r2, first throwing. the lathe in gear, draws tho-roughing cylinder against the slowly revolving block, untiltl arm a strikes against the adjustable'serew-stop e, and holds it there until the cutting cylinder `has'.reduced t'n block to the given size and shape, and he then releases his hold, ivhen thespriugs s draw back the oylindeiran frame to theirformcrfposition, out ofV thewny Then throwing the lathe out of gear, and shipping the mai driving-belt on the lfast 'pulley N, to give a high spedto the roughnly'shapedhub, the operator pulls suecessivel @sus 2 towards` him, bythe handles, the rods attached to the leversfwhereby the sliding-cutters `are advanced, and

complete the work by a. l'ewclean, slicing cuts.

It is evident that by this arrangement of a double set of cutters, one of which, in a rapid.and e'ec'tive manne-r, cuts away the *surplus wood and reduces the block lnearly to its size and shape, the finishing cutters will preserve their cutting edges much longer, und the work beexp'edited and accomplished ina more-perfect manner. If'desired,-the lathe can be thrown in and outof'gcernt the right momentpautomatically, by any of the usual device's,iin connection Vwith` the belt-shipper. l v i I disclaim the application, broadly, 'of a rapidly revolving. cutting cylinder applied to a slowly revolving object, lforthe purpose of'cutting it to some uniform and. nished turned form; but'l am not aware that cutting cylinders provided with sectionfil cutting bladcs,.capabl'e of being so'. adjusted as to give preliminary approxi# mate form to the'varios classcs of`w`heel hubs, have ever beenused before, and especially in connection with 'sliding-cutters for finishing, like mine, whereby great perfection of finish and other important advantages are obtained; but what I do claim", and desire to secure by'lnt'tcrs Patent, isf'- .1. The combination,l inone machinefor turning Wagon hubs, of two sets of cutters, one set/of which may' be brought int'oaction'for.roughingout the hub, and a seco-ndv set then brought into action for the purpose vof finishing the hub, the mechanism t'hcreofheing constructed and arranged to operate substantiallyas set forth.

. 2. Thecombination of the yoke-frame D-'hingefl' to the main frame A, roughing cylinder C, arm a, rod 7:2, 4

and spring s, said parts being respectively constructed and arranged substantially as described.

, 3. So arranging the operating mechanism of the twosets of cutters that the roughing cutters shall revolve at m'iii'gh speed at the same time' tha-t the hb subjected. to its-action revolves slowly, and the adjustable finishing cutter, xed Vupon slides, shall act upon the hub wherirnl'c to' revolve at an increased speed, substantially in the manner set forth.4 I v i ANDREW GGODYEAR.

Witnesses:

.Geenen Jonsson, Omo L. Jonsson; 

